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Desalination and Water Treatment Volume 57, 2016 - Issue 60
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Articles

Removal competition mechanism of orthophosphate and pyrophosphate by CaFe-Cl-LDHs

Yunfeng XuSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Siqi GuoSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Wei XiaSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Li DouSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Jizhi ZhouSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Jia ZhangSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Jianyong LiuSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Guangren QianSchool of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd., Shanghai200444, P. R. China, Tel. +86 21 66137745; Fax: +86 21 66137761, Tel./Fax: +86 21 66137746, Tel. +86 21 66137769; Fax: +86 21 66137761, Tel./Fax: +86 21 66137758Correspondence[email protected]
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Pages 29393-29403 | Received 14 Dec 2015, Accepted 27 Mar 2016, Published online: 22 Apr 2016
 
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Abstract

Large amount of phosphorous is the main factor for eutrophication. Removal of orthophosphate and pyrophosphate with CaFe-Cl-LDHs was explored in the paper. And the aim of this paper was to investigate the different mechanisms of orthophosphate and pyrophosphate removal by CaFe-Cl-LDHs. The results displayed that the removal process was precipitation-dissolution between Ca2+ and orthophosphate or pyrophosphate, which was fitted with the pseudo-second-order equation well; when Ca2+ was not enough, pyrophosphate had a competitive advantage over orthophosphate; as the concentration of pyrophosphate increased, precipitate was formed by Ca2+ and . The simultaneous removal of orthophosphate and pyrophosphate on CaFe-Cl-LDHs was also evaluated to provide information for the treatment of domestic and industrial wastewaters.

Acknowledgments

This work was financially supported by the National Nature Science Foundation of China (No. 41472312/D0218), and Innovative Research Team in University (No. IRT13078).

Notes

Presented at the 8th International Conference on Challenges in Environmental Science & Engineering (CESE-2015) 28 September–2 October 2015, Sydney, Australia

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